X-Pulse XP1000.5 Installation & Operating Manual - Settings & Adjustments
SETTINGS & ADJUSTMENTS
All-ln-One Fully Active Concept Amplifier
Being a full concept amplifier the XP1000.5
allows comprehensive user-controlled amplifi-
cation of a complete 5-channel satellite/sub-
woofer sound system, i.e. two pairs of satel-
lites (front and rear coaxial or component
speaker systems) and one subwoofer.
Active FiItering Control
Basically the internal electronic highpass/low-
pass cross-over filtering circuitry separates
the frequency spectrum from the signal inputs
of the XP1000.5 into highpass (F
HP
) signals
(which exclude all frequencies below the sel-
ected point) and lowpass (F
LP
) signals (which
exclude all frequencies above the selected
point). The HIGHPASS signals for FRONT and
REAR are then internally transferred to the res-
pecitve satellite amplification sections and the
LOWPASS signal is 'sent' to the SUB(woofer)
amplifier section. Therefore the actual speaker
outputs will only receive lowpass or highpass
filtered amplified signals, and the respective
speakers will only have to work in the frequen-
cy bands they will reproduce best. The high-
pass filter of the SUBSONIC section cuts out
the frequencies below the set point complete-
ly. AII XP1000.5 filters feature a12 dB/oct cut-
off/cut-in slope.
In addition to the individually adjustable filte-
ring frequencies, the XP1000.5 also offers inde-
pendently adjustable Q-factor control for each
of the three amplifier sections for the perfect
matching and fine-tuning of the overall speaker
system.
Before you begin with the frequency, level and
Q-factor settings, all tone controls (Bass, Mid,
Treble) and all fader and balance controls etc.
on the head unit have to be set to neutral or
center position! The "Loudness" function
should also be deactivated.
If your head-unit features a separatly adjusta-
ble (fullrange signal) Sub-Level Output, make
sure to also set this control to its center positi-
on before adjusting the SUB LEVEL on the
XP1000.5.
IMPORTANT! For best results it is recommen-
ded to make the settings and adjustments on
the frequency, level and Q-factor controls in
the same order as they are described in this
manual. In case you should feel lost with the
adjustments at any point, you can always use
the Standard System Settings as shown on
page 24 (fig. 4) of this manual and try fine-
tuning from there. For any further help please
contact your X-PULSE dealer.
Frequency Settings
Remove the perspex cover on the top side of
the amplifier in order to access the controls of
the XP1000.5
SUBSONIC Highpass Frequency Setting F
HP
lf the subwoofer amplification power reserves
are rarely used to their full extent, the SUB-
SONIC Highpass frequency control F
HP
can
basically be set at the lowest possible level of
11 Hz. A SUBSONIC F
HP
setting at e.g 14 Hz
means that all frequencies below 14 Hz (sub-
sonic frequencies) are cutout from the ampli-
fied frequency spectrum. Subsonic frequen-
cies are inaudible but they draw at lot of ampli-
fier power and cause unnecessary and exces-
sive speaker cone movement. Therefore a
fixed electronic subsonic filter in the signal
path increases the overall power stability of
the subwoofer(s)!
In case the subwoofer will be played at high
volumes regularly or for extended periods of
time, a higher setting of the subsonic F
HP
con-
trol between 25 and 35 Hz will increase the
power stability of the subwoofer(s) considera-
bly, especially subwoofers equipped with
drivers of 10" (25 cm) diameter or less.
In general any subsonic highpass setting
above 20 Hz will increasingly reduce mechani-
cal and electrical 'strain' on the one hand,
while on the other hand simultaneously redu-
cing the audible parts of the low frequency
range. Subsonic highpass filtering above
40 Hz is normally not recommendable, unless
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